caobinzi opened a new issue, #7130:
URL: https://github.com/apache/iceberg/issues/7130
### Apache Iceberg version
1.1.0 (latest release)
### Query engine
Other
### Please describe the bug 🐞
In the `HadoopCatalog` class, the `listTables` api can't list top level
tables, this seems a bug of the api, as iceberg allows user to create table
without `namespace/databse`, the check needs to be removed to support querying
toplevel tables
`
public List<TableIdentifier> listTables(Namespace namespace) {
Preconditions.checkArgument(
namespace.levels().length >= 1, "Missing database in table
identifier: %s", namespace);
`
https://github.com/apache/iceberg/blob/apache-iceberg-1.1.0/core/src/main/java/org/apache/iceberg/hadoop/HadoopCatalog.java#L189-L191
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